Leadership Stereotypes and Styles of Female Singaporean Principals

This paper investigates how a sample of female Singaporean secondary school principals perceived their leadership styles and compares their responses to a similar study carried out recently of female English head teachers. The education systems of England and Singapore are quite different. The English environment allows schools significant autonomy in personnel management and the majority of head teachers and senior managers are male. In contrast, the Singaporean educational environment is quite centralized, including the management of career paths, and the proportion of female senior managers is much higher. Interviews were conducted with 11 female Singaporean principals to identify their styles of management, leadership perspectives, and attitudes. The discussion first focuses on whether or not the styles of the principals in relation to ‘masculine’ or feminine’ stereotypes of leadership were similar to those of the English head teachers. Further comparison is made of the leadership attributes of the two sets of principals, including styles of management, decision‐making, working environment, need for vision, and values.     

Experienced physical education teachers reaching their "use-by date": powerless and disrespected

With the needs of experienced teachers potentially overshadowed by a focus on recruitment, the purpose of this study was to retrospectively explore the reasons why three experienced physical education teachers resigned. They were interviewed through Louis and Smith's (1990) quality of work life (QWL) model. Data suggested shared dissatisfactions related to the lack of "genuine" opportunities to participate in educational debate and decision making, and limited professional respect shown by administrators and parents. A physical education teacher's "use-by date" was proposed. Unless these issues are further explored and addressed, quality teachers will continue to abandon the service.     

强酸性阳离子交换树脂催化合成缩酮

本文以强酸性阳离子交换树脂作催化剂 ,以环已酮与乙 =醇的缩合为探针反应 ,考察了影响缩合反应的各种因素。结果表明 ,强酸性阳离子交换树脂具有良好的催化活性和稳定性 ,缩酮收率可达 89%以上     

Secondary School Art Teachers' Concepts of Teaching in Hong Kong

Recently, there has been considerable concern among art educators and cultural policy makers to promote art education in Hong Kong. The launch of the new curriculum of a discipline-based character in 1996 generated debate in the art education circle of Hong Kong. There were diverse opinions on the rationale for teaching art. Concern was expressed about the present constraints of art teaching related to teachers' ability and school administration poses another important issue that seems to inhibit further developments. This paper reports part of the findings of a study on art teachers' concepts of teaching. It explores the concepts of about 20 secondary art teachers in Hong Kong. Several categories of teaching are derived from interviews: aesthetic development, moral development, intellectual development, expression and therapy, and intellectual and aesthetic development. A scheme is developed which can be used to analyze teachers' concepts as education in or through art on a continuum from subject to learner centred.     

Locating Self in the World: Elementary school children in Japan,Macau and Hong Kong

In the so-called 'global age', the issue of how children learn to locate themselves in the world is an important one. Working from a foundation of theories related to globalisation, identity development and citizenship education, this paper describes the findings of a research project which explored elementary school children's geographical and affective location of the self in Japan, Macau and Hong Kong. Analysis and discussion of Japanese education policy is then presented in an attempt to explain the finding that Japanese children are far less likely than their counterparts in Hong Kong and Macau to locate themselves in an international sphere.     

Dielectrophoretic manipulation of particles in a modified microfluidic H filter with multi-insulating blocks

The conventional microfluidic H filter is modified with multi-insulating blocks to achieve a flow-through manipulation and separation of microparticles. The device transports particles by exploiting electro-osmosis and electrophoresis, and manipulates particles by utilizing dielectrophoresis (DEP). Polydimethylsiloxane (PDMS) blocks fabricated in the main channel of the PDMS H filter induce a nonuniform electric field, which exerts a negative DEP force on the particles. The use of multi-insulating blocks not only enhances the DEP force generated, but it also increases the controllability of the motion of the particles, facilitating their manipulation and separation. Experiments were conducted to demonstrate the controlled flow direction of particles by adjusting the applied voltages and the separation of particles by size under two different input conditions, namely (i) a dc electric field mode and (ii) a combined ac and dc field mode. Numerical simulations elucidate the electrokinetic and hydrodynamic forces acting on a particle, with theoretically predicted particle trajectories in good agreement with those observed experimentally. In addition, the flow field was obtained experimentally with fluorescent tracer particles using the microparticle image velocimetry (μ-PIV) technique.     

Improvement of rectification effects in diffuser/nozzle structures with viscoelastic fluids

This paper reports the improvement of rectification effects in diffuser∕nozzle structures with viscoelastic fluids. Since rectification in a diffuser∕nozzle structure with Newtonian fluids is caused by inertial effects, micropumps based on this concept require a relatively high Reynolds numbers and high pumping frequencies. In applications with relatively low Reynolds numbers, anisotropic behavior can be achieved with viscoelastic effects. In our investigations, a solution of dilute polyethylene oxide was used as the viscoelastic fluid. A microfluidic device was fabricated in silicon using deep reactive ion etching. The microfluidic device consists of access ports for pressure measurement, and a series of ten diffuser∕nozzle structures. Measurements were carried out for diffuser∕nozzle structures with opening angles ranging from 15° to 60°. Flow visualization, pressure drop and diodicity of de-ionized water and the viscoelastic fluid were compared and discussed. The improvement of diodicity promises a simple pumping concept at low Reynolds numbers for lab-on-a-chip applications.     

An exploratory study on collaborative modes of professional development and learning for teachers of students with autism spectrum disorder (ASD)

This study aims to deliver a school‐based mode of training for in‐service teachers of students with ASD in Hong Kong. The training is delivered following the phases of implementation science, namely, exploration, installation, and implementation. The project team used the theory of mind approach, which enables teachers to engage with students with ASD and to focus on recognizing and reacting to emotions. Participants in this study included four educators from a teacher education institution, three expert teachers, and 19 in‐service teacher trainees. The most salient responses came from trainees who were provided with the opportunity to apply learned skills in their own classrooms immediately and to share the knowledge and skills in dealing with students with ASD in the post‐conference meetings.     

Literacy and capital in immigrant youths' online networks across countries

Communication technologies are playing an increasingly prominent role in facilitating immigrants' social networks across countries and the transnational positioning of immigrant youth in their online language and literacy practices. Drawing from a comparative case study of the digital literacy practices of immigrant youth of Chinese descent, this paper examines the cross-border social relationships that are fostered between the youth and their peers in their natal country through the use of instant messaging and other online media. Using Pierre Bourdieu's capital and field theory, and the concept of social capital, this paper considers how literacy development in transnational contexts constitutes the production of social and cultural capital. It argues that the youths' online literacy practices need to be understood within the particular social fields in which they are situated and how they allow the youth to navigate and take up position within social fields that cross national boundaries.